BMW Chassis Reinforcement Kits & Parts

Rear Axle Carrier Panel (RACP) failure is a well-documented issue that plagues all BMW E46 models. Due to thin sheet metal mounting, the forces applied during cornering, acceleration, and braking create stress fractures in the carrier panel, resulting in large cracks or breaks that risk the structural integrity of your chassis. To fix this issue, many enthusiasts opt to install weld-in reinforcement plates on the underside of the RACP. While this remedies the formation of additional stress cracks and adds rigidity to failure-prone areas, it does not prevent the entire carrier panel from flexing during high-performance driving.

Our all-new Rear Subframe Reinforcement Brace is engineered to add structure to the E46's rear chassis under high-stress conditions, eliminating the common weak points in the RACP while providing the confidence you need for performance driving. Don't let chassis flex limit your car’s potential—upgrade your E46 with the Turner Motorsport Rear Subframe Reinforcement Brace today!

How It Works:

During performance driving, the Rear Axle Carrier Panel (RACP) must react the forces of longitudinal and lateral accelerations. During forward acceleration, the differential transmits torque through the subframe to the RACP, forcing the rearmost subframe mounting points downward. This downward movement flexes the carrier panel, reducing its ability to handle torque efficiently. By linking the rearmost subframe mounting points to the rear shock towers, downward flex is restricted, resulting in improved torque transfer and stability. Alternatively, high-grip cornering generates lateral acceleration (side-to-side) forces across the RACP. Similar to how a rear strut brace functions, connecting the rear shock towers helps to counteract these forces. Adding the subframe to this connection further reduces lateral loads, eliminating side-to-side flex and enhancing overall stability.

Features & Design:

Four-Point Triangulated Structure: Links the rearmost subframe mounting locations to both rear strut towers for superior load distribution. Enhanced Stability: Reduces lateral and longitudinal RACP flex during acceleration, braking, and cornering. Improved Torque Transfer: Minimizes downward flex of the RACP, ensuring efficient power delivery for enhanced driveability. High-Performance Durability: Heavy-duty steel tube construction ensures lasting support during spirited driving, track use, and for vehicles with increased power output. Blue Powdercoat Finish: Offers fantastic corrosion resistance, protection from scuffs and scratches, and a stylish appearance that is sure to complement your performance-centric E46. Underside Reinforcement Compatibility: Designed to work seamlessly alongside our underside RACP reinforcement plates (TDR4675412, T#91). Kit Includes:

Rear Subframe Brace Extended-Length Drill Bit (1/4", 12" Overall Length) High-Speed Drill Bit (12.5mm, 152mm Overall Length) Drill Bit Guide Extended Subframe Bolts Zinc-Plated Steel Hex Nut (2) Installation & Support:

Need installation tips? Our team has assembled a guided start-to-finish installation tutorial, including detailed instructions on drilling and cutting your trunk floor panel for perfect fitment. Click HERE for Installation Instructions.

BMW E30 Frame Rail Reinforcement Kit from Turner Motorsport addresses a critical weak point in the chassis to enhance the structural integrity of your BMW. Leveraging two decades of racing expertise, Turner Motorsport delivers performance parts that combine exceptional quality, value, and functionality. This reinforcement kit is designed to strengthen the frame rails of the E30, improving handling and durability for a more responsive driving experience.

• Enhanced Structural Integrity: Reinforces the frame rails to address common weak points in the E30 chassis.
• Improved Handling: Stiffens the underside of the vehicle for better road handling and stability.
• Durable Construction: Built to withstand the demands of both street and track use.
• Expert Design: Developed with insights from Turner Motorsport’s extensive racing experience.

This kit is essential for maintaining your BMW E30's performance and reliability over time.

BMW F8X M2 M3 M4 Chassis Bracing

The BMW F8X M2 M3 M4 Chassis Bracing is designed to enhance the rigidity and stability of the chassis, providing improved handling and performance for your BMW. Turner Motorsport offers this high-quality brace to support better driving dynamics and reduced flex during aggressive driving.

Benefits:

• Enhanced Rigidity: Significantly increases chassis stiffness, leading to improved handling and reduced body roll.
• Improved Stability: Minimizes chassis flex for more precise steering responses and better overall control.
• High-Quality Construction: Made from durable materials to ensure long-lasting performance and reliability.
• Easy Installation: Designed for straightforward installation with minimal modifications required.
• Optimized Performance: Perfect for both street and track use, enhancing the driving experience and vehicle performance.

Reduces chassis flex for improved handling and control. Beautiful carbon weave for both a functional and aesthetic enhancing upgrade for your G20 or G42!

The G20 and G42 come in a variety of different models offering a variety of performance options. Whether you have a B48 or B58 they both provide an exhilarating driving experience but are missing a key component found on the M3 and M4, chassis bracing. Taking performance cues from the more performance based "M" chassis we are able to bring an immense value add to your new 2 or 3 series to get the most out of your driving experience with our new 3-point strut brace. This is the only strut brace on the market that takes the handling characteristics from the M3 and puts them to use on your vehicle.

An instant upgrade with no modification needed. Fits directly on your vehicle utilizing factory hardware and supplied stud kit. Designed for both street and track use this 2 piece strut brace is mounted together to create one uniform brace for the best improvement in handling.

Strut tower braces are an excellent and common handling upgrade that work by bracing the shock towers together to reduce chassis flex during cornering. Our engineers designed and tested our one of a kind carbon fiber strut brace in-house to increase chassis rigidity and improve handling during aggressive driving in your 2 or 3 series G chassis BMW. Turner Motorsport has engineered a lightweight* and extremely rigid strut brace kit comprised of carbon fiber with billet aluminum end brackets that will not only enhance your driving experience but also provide an eye-catching addition to your engine bay. This addition gets your chassis once step closer to competing with the BMW M cars that come equipped with factory strut braces!

Our Turner Carbon Fiber Strut Tower Brace for your G20/G42 is incredible! Not just a show piece, This front strut brace is a precision engineered structural component that ensures power is transferred properly and not lost through chassis flex, without any increase in NVH. Adding the strut tower brace allows cornering load to be distributed more competently between both strut towers to reduce chassis flex, preventing changes in wheel alignment geometry that can negatively impact handling.

Carbon fiber is an excellent addition on any vehicle, and offers a very unique look that is found on some of the most exotic vehicles on the road today. This strut brace kit features a clean woven design that is sure to look phenomenal for years to come, and will absolutely compliment your engine bay. This kit includes everything you need for installation.

Design:

CAD designed for perfect integration with the stock mounting locations and features in the engine bay.
Utilizes the factory mounting hardware and supplied mounting studs
Designed with an oval cross-sectional area for increased rigidity
Manufactured using structural carbon fiber with a 2x2 twill weave outer layer for increased rigidity and a great look in the engine bay.
The aluminum chassis mounts are machined from 6061-T6, type II black anodized and bonded to the carbon structure to ensure secure and strong mounting of the strut brace to the chassis.
Performance and Benefits:

Increases structural rigidity of the chassis
Direct fitment
Functional and aesthetic upgrade
Hand-laid Gloss Carbon Fiber
Billet aluminum mounting

M7 Speed Suspension Product for Generation 2 MINI Cooper Models (R55-R59)

M7 Speed proudly introduces a unique suspension product for the popular Generation 2 MINI Cooper models R55 through R59. These affordable vehicles are becoming the choice for many entry-level modifiers in the German performance car segment, and they are great for Rally Cross.

Engineered to transform the mild-mannered MINI into a more capable and versatile daily driver, this product is perfect for today’s lifestyle. Whether it's for spirited adventure motoring, weekend overlanding, living off the grid, or tackling pothole-riddled urban streets, the M7 Speed 2" Lift Kit makes it possible. By installing this lift kit, the MINI is elevated by 2 inches, plus an additional lift from larger diameter tires (up to an extra 1.5 inches). No additional modifications are required—simply bolt it in, perform a realignment, and enjoy! Add aftermarket wheels and larger tires to create a unique, durable, and practical vehicle that everyone will love.

The M7 Speed Stage 1 Kit includes everything needed for the transformation. This kit features precision-fabricated lift blocks and a set of MAXX-G heavy-duty adjustable front sway bar links. These shorter links are necessary to prevent suspension bind that can occur with stock-length sway bar links.

Stage 1 Kit Includes:

• 2" Lift Kit with high-strength assembly hardware (2 front riser blocks, 2 rear riser blocks)
• Set of MAXX-G Heavy Duty Adjustable Front Sway Bar Links
• Hardware kit with high-strength, proper-length bolts and new locking nuts

Features:

• Engineered using 3D CAD software and finite element simulation for proper fitment and safe, fail-proof performance
• CNC laser-cut parts
• Lightweight fabricated steel design
• Black urethane powder coating for corrosion protection and a quality appearance
• Designed for easy bolt-on installation, complete with all new high-strength hardware and installation instructions

MAXX-G Adjustable Sway Bar:

• Enhances cornering performance, provides bind-free suspension travel, improves suspension alignment, and overall chassis balance
• Features sealed and permanently lubricated forged steel ball stud & socket ends for easy installation
• Includes a military-grade aluminum adjuster sleeve with opposing RH & LH threads for simple length adjustments
• Replaceable link ends make maintenance easy

M7 Speed is the world leader in MINI adventure motoring, overlanding, and ultimate performance products. Renowned for exceptional customer service and product innovation, M7 Speed is dedicated to engineering and producing high-quality, easy-to-install aftermarket performance products. Located in Mooresville, North Carolina, also known as Race City USA, M7 Speed is at the epicenter of North American motorsports.

Let's face it, the E36 is an old chassis but it's still the most popular car to build for track-use. But because of it's age, certain parts of the chassis are prone to structural failure. We've been racing the E36 for over ten years so we know what the weak points are and how to make them stronger. Included with this package are the reinforcement kits that are absolutely necessary for a car that sees any time on the track. Street cars will also benefit from these pieces as your car can take almost as much of beating on the road as on the racetrack.Buy as a package and save 10%! Package includes reinforcements for the following areas:

• front subframe
• front strut towers
• front strut tower paper gaskets
• rear sway bar / swaybar tabs
• rear shock towers
• rear subframe
• rear camber arms (optional)

​This item fits the following BMWs:
1992-1998 E36 BMW 318i 318is 323is 325i 325is 328i 328is - Not M3

Rally Road Productions, Inc. is a team supported by a group of people with great abilities in their area of expertise. From the "web guy" and driving instructor friends, to owners of various machine shops, they have surrounded ourselves with people that can be trusted to create and manufacture quality products. This is the key to ensuring everything that they sell will perform as it was intended. The goal is to increase customer satisfaction and make the customization or performance enhancement of your vehicle a more enjoyable venture.

Have you ever snapped a transmission brace under full throttle? NOT a fun experience. For that reason, Rally Road has come up with the very last transmission brace your E36 will ever need. 

Back when the minds at BMW set out to design the E36's lower transmission support, they executed perfectly. A cast piece manufactured from lightweight aluminum would surely provide the proper support for the business end of the powertrain. This part functioned fine...mostly...when the vehicle was driven modestly. However, push it too hard and this brace becomes perfectly unusable when it snaps in half. 

This upgraded piece is manufactured out of solid steel. Laser cut, precision CNC bent, and then tig welded together - this thing is ready to take a beating. Finish it off with a flawless black powder coat and what you have is a transmission brace that is as beautiful as it is bulletproof. Whether you're considering this as an alternative to an already broken piece or just shopping for your next mod, this is a must-have for ANY E36 owner.

There are a lot of enthusiasts still committed to the E30 3-series. For these owners, giving up their 318, 325, or M3 is out of the question. We've tried to make it harder for them to part with their cars by developing reinforcements for common weak areas of the E30 chassis. With these pieces, you can prevent a costly repair or total failure that could cost you lots of money. These are a must-have for any E30 restoration (yes, restoration is the right word these days) or even during normal suspension work. Included in this package are reinforcements for:

• front subframe
• rear sway bar / swaybar tabs (from trunk floor)
• rear lower sway bar tab (on trailing arm)
• optional front sway bar tab (M3 only)

This item fits the following BMWs:
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is M3